List of Articles Tax Open Access Article Abstract Page Full-Text 1 - Examining the Challenges and Methods of Receiving Taxes of the Digital Economy in Isfahan Province Vahid Bekhradi Nasab Amin Bazrafakn Ali Khoshdel Open Access Article Abstract Page Full-Text 2 - The Impact of Corporate income Tax and Firm Size on Fixed Investment Omer Saeed Sidra Shafiq Khurram Shahzad Open Access Article Abstract Page Full-Text 3 - Validation of the National Tax Capacity Model: A Marketing Approach aliasghar torabahmadi Hossein Vazifehdoost Fereydoon Rahnamay Roodposhti